Overview
A worn clutch drum and sprocket kit leads to sloppy chain tracking and increased vibration. This replacement unit is manufactured to OEM specifications, giving you dependable engagement and smooth power transfer without the dealer markup. It is one of those maintenance items worth keeping on the shelf so you are not stuck mid-project with a failing saw.
Key specifications
- Pitch: .325”
- Teeth: 7T
- Material: hardened steel
- Type: aftermarket replacement
Compatibility
Designed for Husqvarna 345 346 350 353 445 450 445e plus additional saws with identical clutch-drum geometry. Check the full compatibility chart before ordering, as small production-year changes can affect fitment.
Installation notes
Pull off the side cover and bar assembly. Use a piston stop to lock the crank, then remove the clutch mechanism. Swap the drum, sprocket, and bearing as a set for best results. Reassemble in reverse order, set chain tension so the chain lifts slightly off the bar underside, and run a short idle test to check for vibration or noise.
Common questions
Q: Will the 5038730-72 clutch drum sprocket kit fit my Husqvarna 450e, or is it only for the older 345/350 models?
Yes, this kit fits the Husqvarna 450e along with the 345, 346, 350, 353, 445, 450, and 445e, and it also fits the Jonsered 2159. The important match points are the saw model and that you are using a .325” pitch setup, since this is a .325” 7-tooth drum sprocket kit.
Q: My Husqvarna 346XP is currently set up with a different chain pitch—can I use this 5038730-72 drum anyway?
Only if your bar nose sprocket and chain are also set up for .325” pitch. The clutch drum, chain, and bar tip all need to match pitch, so if your saw is currently running 3/8” or another pitch, you would need to convert the whole cutting setup, not just the drum.
Q: When installing this 7T clutch drum sprocket kit on a Husqvarna 445, should I replace anything else or check for wear?
Yes, it is a good idea to inspect the rim/drum contact surfaces, clutch bearing, washer, and clip during installation, and replace any worn parts at the same time. If the old sprocket has visible groove wear or the bearing feels rough, changing those parts together helps the new .325” sprocket and chain wear evenly and run smoother.
